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01099 am a22001573u 4500 |
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385690 |
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|a dc
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|a Nedeljković, Miloš
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|a Soref, Richard
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|a Mashanovich, Goran Z.
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|a Predictions of free-carrier electroabsorption and electrorefraction in germanium
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|c 2015-06-01.
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|z Get fulltext
|u https://eprints.soton.ac.uk/385690/1/stamp.jsp_tp%253D%2526arnumber%253D7094964%2526tag%253D1
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|a Germanium is becoming an important material for mid-infrared photonics, but the modulation mechanisms in Ge are not yet well understood. In this paper, we estimate the size of free-carrier electroabsorption and electrorefraction effects in germanium across the 2 to 16 µm wavelength range at 300 K. The predictions are based as much as possible upon experimental absorption data from the literature and are supported by extrapolations from experimental data using first-principle quantum theoretical modeling. We find that free-carrier absorption is substantially stronger in Ge than in Si.
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